C573 I'm Not Wrong

Zhai Yu and the rest had already noticed, and Chu Qing, with his sharp eyes, had seen the bamboo tip's color change too. That's why he had them halt and change course. All along, he had been anticipating that very signal.

The purple bamboo in question had thrived in the Purple Bamboo Forest for nearly three hundred years. Elders often said it was on the verge of becoming sentient